The Prophet ﷺ said the takbir seven times and five times in the Eid prayer.
حدثنا أبو كريب محمد بن العلاء حدثنا عبد الله بن المبارك عن عبد الله بن عبد الرحمن بن يعلى
أن النبي ﷺ كبر في صلاة العيدين سبعا وخمسا
[Its chain of transmission is hasan] Abu Dawud narrated it in the Book of Prayer, Chapter on the takbir in the two Eids, no. 1151, from the hadith of Abdullah bin Abdul-Rahman, with this chain, and Ahmad, Bukhari, Ibn Madini, Nawawi, Asqalani, and others graded it sahih.